* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

html,
body {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-size: 15px;
    font-family: Arial, Helvetica, sans-serif;
}

a {
    text-decoration: none;
    color: #000;
}

li {
    list-style: none;
}

button {
    background-color: #ffffff;
    border: none;
}